\newcommand{\infoTitle}{~信息}
\newcommand{\warnTitle}{~注意}
\newcommand{\alertTitle}{~警告}
\newcommand{\tipTitle}{~提示}
\newcommand{\helpTitle}{~帮助}

\newcommand{\infoTitleFa}{\faInfoCircle[solid]\ }
\newcommand{\warnTitleFa}{\faExclamationTriangle[solid]\ }
\newcommand{\alertTitleFa}{\faTimesCircle[regular]\ }
\newcommand{\tipTitleFa}{\faHandPointRight[regular]\ }
\newcommand{\helpTitleFa}{\faQuestionCircle[regular]\ }

\newcommand{\introductionTitle}{内容提要}
\newcommand{\problemsetTitle}{习题}

\ifdefined\chaptername
\renewcommand{\chaptername}{第 \thechapter\;章}
\fi